Laser shock processing of 2024-T62 aluminum alloy

被引：86

作者：

Zhang, H

Yu, CG

机构：

[1] Changchun Inst Opt & Fine Mech, Dept Mech Engn, Changchun 130022, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Dept Engn Mech, Nanjing 210016, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 257卷 / 02期

关键词：

laser shock processing; aluminum alloy; fatigue; fatigue crack growth;

D O I：

10.1016/S0921-5093(98)00793-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Laser shock processing (LSP) is a relatively new technique for strengthening metals. A method developed for optimizing the LSP parameters is reported in this paper. The effects of LSP on the microstructure, hardness, surface roughness, residual stress, fatigue life, fatigue crack growth (FCG) of 2024-T62 aluminum alloy were investigated. The fatigue life of the laser-shocked specimens was two times greater than that of the unshocked specimens. The fatigue crack growth rates (FCGRs) at a given stress intensity were reduced by over one order of magnitude. The fatigue behavior improvements were attributed to a combination of increased dislocation density, decreased surface roughness and compressive residual stress induced by the laser shock waves. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：322 / 327

页数：6

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